THE MAHARAJA SAYAJIRAO UNIVERSITY OF BARODA, VADODARA

Ph. D. ENTRANCE TEST (PET) –27thJanuary 2019

Roll. No.
Signature of Invigilators
(in figures as in Hall Ticket)
Chemical Sciences
Roll No. __________________
(19/25)
________________________ __________________________
(in words)

Maximum Marks: 50No. Of Printed Pages :8

Instruction for the Candidate:

1. Write your Roll Number in the space provided on the top of this page.
2. This paper consists of FIFTY (50)multiple choice type questions. Each Question carriesONE (1) mark.
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 Chemical Sciences
(19/25)
Note: This paper contains FIFTY (50) multiple-choice questions. Each Question carries ONE (1) mark.
01) The separation mechanism operating in GLC is: 06) Which of the following is true?
A) Partition A) The area under a DTA peak represents the
B) Adsorption enthalpy of the change
C) Size exclusion B) In DTA, both the reference and sample
D) Ion exchange undergo change with temperature
C) DTA is an abbreviation for Direct Thermal
02) Of the following statements, which ones will be Analysis
true for a high pressure ternary gradient HPLC D) Change in mass of sample with respect to that
system? of reference is determined in DTA
i. Three solvent reservoirs are required
07) Which of the following is not true about galvanic
ii. In-line degasser is required method of oxygen analysis?
iii. One pump and a proportionating valve are A) Electrodes are composed of noble and base
required metals
B) It can measure dissolved content of oxygen
iv. Three pumps and a mixing tee are required C) Its principle is based on electrolysis
D) It utilizes an electronic cell
A) Only i, iii
B) Only i, ii, iii 08) The molarity of anNaOH solution was determined
C) Only i, ii, iv by titration vs KHP. Individual titrations gave the
D) Only i, iv following concentrations: 0.1127 M, 0.1126 M,
0.1132 M, 0.1174 M, 0.1173 M. With respect to
03) The method of least squares for determining the rejection of data using Q test, and considering
best straight line through a collection of data points Qcrit at 90% confidence level as 0.642, which of
is based on what principle? the following statements is true?
A) R2 should be equal to one. A) Both the values, 0.1126M and 0.1174 M, are
B) Both sm and sb are negligible retained
C) The slope should be close to 1 and intercept B) The value 0.1126 M is rejected while 0.1174 is
should equal 0. retained
D) The sum of the squared y-residuals is C) The value 0.1126 M is retained while 0.1174
minimized. M is rejected
D) The value 0.1132 M is rejected
04) Mass analyzer in mass spectrometer is similar to
which of the following in optical spectrometer? 09) Arrange the following oxides in order of their
A) Source increasing acidic character:
B) Monochromator A) N2O < Na2O < As2O3< Cl2O7
C) Detector B) N2O < Cl2O7< As2O3< Na2O
D) Slit C) Na O < N O < Cl O < As O
2 2 2 7 2 3
D) Na2O < As2O3< N2O < Cl2O7
05) Which of the following statements is incorrect?
A) UV absorption is due to electronic transitions 10) Which of the following species does not give
B) UV spectra provide information about valence oxygen on heating?
electrons A) KClO3
C) IR absorption is attributable to transitions B) Zn(ClO3)2
between rotational energy levels of whole C) (NH4)2Cr2O7
molecules D) K2Cr2O7
D) NMR spectrometers use radiofrequency
electromagnetic radiation

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11) On the basis of VSEPR theory, the geometry of 17) Which of the following substituted silane on
XeOF4 can be described as ___________. hydrolysis gives cross-linked silicone polymer?
A) Trigonalbipyramidal with O in axial position A) (CH3)4Si
B) Trigonalbipyramidal with O in equatorial B) (CH3)3SiCl
position C) (CH3)2SiCl2
C) Square planar with O and a lone pair cis to D) CH3SiCl3
each other
D) Square bipyramidal with O and a lone pair 18) The ligand field bands of lanthanide complexes are
trans to each other sharper than those of transition metal complexes
because_______.
12) The pair of compounds in which both the metals A) f-orbitals compared to the d-orbitals interact
are in the highest possible oxidation state is less effectively with ligands
_________. B) f-orbitals have higher energy than d-orbitals
A) CrO2Cl2, MnO4– C) Transitions are allowed for lanthanide
B) [Co(CN)6]3–, MnO2 complexes
C) [Fe(CN)6]3–, [Co(CN)6]3– D) Intensity for the bands are higher for
D) TiO2, MnO2 lanthanide complexes

13) The compound X on heating gives a colourless gas 19) The total number of metal-metal bonds in
and a residue that is dissolved in water to give Os3(CO)12 and Co4(CO)12, respectively are
compound Y. Excess of CO2 is bubbled through ________.
aqueous solution of Y, Z is formed. Solid Z on A) 0 and 4
gentle heating gives back X. Then the compound is B) 3 and 4
____________. C) 3 and 5
A) Na2CO3 D) 3 and 6
B) CaCO3
C) K2CO3 20) If any radioactive substance is subjected to
D) CaSO4.2H2O vacuum, the rate of disintegration per second
_____.
14) Which of the following symmetries of CO A) Suffers a slight decrease.
stretching vibrations in Fe(CO)5 (D3h) are IR B) Increased considerably.
active? C) Increase only if the products are gaseous.
A) A1′ and E′ D) Not affected.
B) A2′′ and E′
C) A1′ and A2′′ 21) ______ metal is present at the active site of protein
D) A1′, A2′′ and E′ carboxypeptidase A.
A) Molybdenum
15) Which of the following is a soft base? B) Iron
A) CO32– C) Zinc
–
B) OH D) Copper
–
C) H
D) CH3COO– 22) When Fe(CO)5 reacts with OH– to form compound
X, which on oxidative with MnO2 gives compound
16) Identify the nido-borane from the following: Y. Compounds X and Y respectively are
A) B5H9 __________.
2–
B) [B6H6] A) [HFe(CO)4]– and Fe2O3
C) B4H10 B) [HFe(CO)4]– and Fe3(CO)12
D) B5H11 C) [Fe(CO)5OH]– and Fe2(CO)9
D) [Fe(CO)4]2– and Mn(CO)5

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23) Which of the following forms best represent the 27) Predict the main product P in the following
most stable resonance structure for acroline reaction:
(CH2=CH-CHO)?
A) B)

A) PhCH2CH2OAc
C) D) B) PhCH=CHOAc
C) PhCH(OAc)CH3
D) PhCH(COOH)CH3

28) The most stable conformation of

5-hydroxy-1,3-dioxane will be.
24) How will you best describe the change in the
following two structures?
A) B)

A) Change in configuration C) D)
B) Change in conformation
C) There is no change
D) Positional isomerism

25) What is the major product obtained in the

29) If the following compound with 13C labelled
following reaction?
(indicated with *) undergoes given reaction, what
product is expected?

A)
B)

C)
A) B)
D)

26) Arrange the bond angles of indicated H-C-H in the

following compounds.
C) D)

A) H1-C1-H1> H2-C2-H2 > H3-C3-H3

B) H1-C1-H1> H3-C3-H3 > H2-C2-H2
C) H2-C2-H2> H3-C3-H3 > H1-C1-H1
D) H3-C3-H3> H2-C2-H2 > H1-C1-H1

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30) Predict the product of the following reaction. 33) Predict the major product P in the following
reaction.

A) B)
A)

C) D)
B)

C)

31) In the following reaction, the stereochemical

description of P and Q will be.
D)

34) Predict the major product P in the following

reaction.
A) P is ‘R’ and Q is ‘R’
B) P is ‘R’ and Q is achiral PhSH
P
C) P is ‘S’ and Q is ‘S’
D) P is ‘S’ and Q is achiral
A) B)
32) Predict the major product P in the following
reaction.
C) D)

A) B) 35) Which statement will accurately describe the

changes taking place in the IR absorption
frequencies of the following reactions?

C) D) O

A) The IR frequency for carbonyl will decrease in

both reactions (i and ii).
B) The IR frequency for carbonyl will decrease in
i while increase in ii.
C) The IR frequency for carbonyl will increase in
both reactions (i and ii).
D) The IR frequency for carbonyl will increase in
i while decrease in ii.
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36) For the following set of compounds, which 42) Chemisorption is a
statement is correct? A) Multilayer adsorption
B) Monolayer adsorption
C) Bilayer adsorption
D) Desorption
43) Reduced phase rule is given by
A) F= P - C+ 2
B) F= C - P + 2
A) All compounds will show single signal in 1H- C) P = F-C+2
NMR spectra, while compound III will show D) F= C-P+1
most down field signal, while it will appear
most up field for IV. 44) Electrochemical series is based on
B) In 1H-NMR as well as 13C-NMR analysis all A) Reduction Potential on Hydrogen scale
compounds will show one signal only. B) pH scale
C) All compounds will show a single singlet C) Cell Voltage
signal in 1H-NMR spectral analysis. The most D) Temperature Scale
down field signal will be for II, then for III,
then for I and the most up field will be for IV. 45) t1/2 of a reaction is doubled as the initial [reactant]
D) All compounds will show a single singlet is doubled. The order of the reaction is
signal in 1H-NMR spectral analysis. The most A) 1
down field signal will be for III, then for II, B) 0
then for IV and the most up field will be for I. C) 2
D) 3/2
37) Order of steps in a typical polymerisation reaction 46) According to Third law of thermodynamics, if T
is
0 then
A) Termination, Initiation and Progression
A) G = 0
B) Progression, Initiation and Termination
B) H = 0
C) Initiation, Progression and Termination
C) U = 0
D) Progression, Termination and Initiation
D) S = 0
38) Which statement is correct about polymer 47) A crystal having unit cell dimensions abc, ==
A) Polymer can dissolve like a salt = 90° is
B) polymer have fixed molecular weight A) Cubic
C) Polymer has average molecular weight B) Tetragonal
D) number and weight average molecular weights C) Orthorhombic
are equal D) Monoclinic
39) pH of a 10 -7HCl is equal to 48) Which of the following solutions will have the
A) 7 lowest freezing point
B) < 7 A) 0.1 M NaCl
C) > 7 B) 0.1 M KNO3
D) 1 C) 0.2 M glucose
D) 0.1 M Ca(NO3)2
40) Micelles can be called
A) Precipitates 49) Kaof a weak acid is 10-5. pKb of the conjugate base
B) Association colloids is
C) Emulsions A) 6
D) Bilayers B) 9
C) 5
41) Units of molecular partition function are D) 7
A) Cm -1
50) Raman effect is
B) S -1
A) Absorption of light
C) J K -1 mol-1
B) Emission of light
D) dimensionless
C) Elastic scattering of light
D) Inelastic scattering of light
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Rough Work:

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